Science & Technology
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IRIS External Peer Review Draft
Health assessment information on a chemical substance is included in IRIS only after a comprehensive review of chronic toxicity data by U.S. EPA health scientists
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Frequently Asked Questions about the Federal Technology Transfer Act Program
Read about successful Federal Technology Transfer Act (FTTA) partnerships and questions relate to CRADAs, MTAs, NDAs, MCRADAs, and Patents.
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HSRB April 3-4, 2025
Registration and supplemental materials for April 2025 HSRB meeting
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Working Paper: Do Discrete Choice Approaches to Valuing Urban Amenities Yield Different Results Than Hedonic Models?
This is a working paper titled "Do Discrete Choice Approaches to Valuing Urban Amenities Yield Different Results Than Hedonic Models?"
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2014 National Emissions Inventory (NEI) Resources for State, Local, Tribal Agencies
Supporting document for 2014 NEI, including instructions for submitting inputs
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Reports and Summaries
Broad overview of what the NEI report is for.
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Quality Management Plan for Region 3
Describes the policies, procedures and management systems that govern quality control activities of environmental information collection and/or use in EPA Region 3.
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Are the GHGs in the National Emissions Inventory Complete?
No, the 2020 National Emissions Inventory (NEI) does not comprehensively capture all sources and sinks of greenhouse gases (GHGs) in the United States. For this information, users should review the EPA’s annual Inventory of U.S. Greenhouse Gas Emissions and Sinks . However, the NEI does report GHG emissions for select…
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National Emissions Inventory Process - FAQ
National Emissions Inventory Process FAQ
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Marine Solar Radiation Management Permitting
Proposed marine solar radiation management activities—including field research—that involve the disposition of material into a body of water likely need a permit from the EPA or a state with delegated permitting authority.
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Retrospective Case Study in the Raton Basin, Colorado
Study site locations in Las Animas and Huerfano Counties were selected in response to ongoing complaints about changes in appearance, odor, and taste associated with drinking water in domestic wells.
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Retrospective Case Study in Northeastern Pennsylvania
The EPA chose Bradford County, and parts of neighboring Susquehanna County, as a retrospective case study location because of the extensive hydraulic fracturing activities occurring there, coincident with the large number of homeowner complaints.
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Retrospective Case Study in Southwestern Pennsylvania
The location of this case study was chosen in response to homeowner complaints about changes to water quality and water quantity in Washington County.
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Review of State and Industry Spill Data: Characterization of Hydraulic Fracturing-Related Spills
EPA analyzed spill data from states and industry to better understand what is known about spills associated with hydraulic fracturing
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Report: Retrospective Case Study in Killdeer, North Dakota (PDF)
PDF of Killdeer, North Dakota retrospective case study report
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Report: Retrospective Case Study in the Raton Basin, Colorado (PDF)
PDF of retrospective case study in the raton basin, Colorado, EPA report
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Review of State and Industry Spill Data: Characterization of Hydraulic Fracturing-Related Spills (PDF)
The EPA analyzed spill data from states and industry to better understand what is known about spills associated with hydraulic fracturing.
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Report: Retrospective Case Study in Northeastern Pennsylvania (PDF)
PDF of EPA report Retrospective Case Study in Northeastern Pennsylvania
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Sources Contributing Inorganic Species to Drinking Water Intakes During Low Flow Conditions on the Allegheny River in Western Pennsylvania
EPA scientists evaluated sources of bromide and other inorganic pollutants impacting drinking water intakes on the Allegheny River in Western Pennsylvania.
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Report: Retrospective Case Study in Wise County, Texas (PDF)
PDF of EPA report of Retrospective Case Study in Wise County Texas